J.Jpn. Surg. Soc.. 83(2): 207-219, 1982

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Original article

STUDY ON ENDOSCOPIC LASER PHOTOCOAGULATION FOR BLEEDING FROM THE UPPER GASTROINTESTINAL TRACTS

Endoscopic laser photocoagulation is finding a worldwide acceptance as a new useful therapeutic method for gastrointestinal bleeding. We have performed a number of experiment using animals to investigate the safety and effectiveness of irradiation of both Nd-YAG and argon lasers. We also compared the effectiveness of laser irradiation and monopolar electrocoagulation in the arresting of bleeding from gastric ulcers.
1) A histological examination disclosed that Nd-YAG irradiation could shrink the submucosal tissue more remarkably, and might be more useful for hemostasis.
2) High power argon laser perforated the whole thickness of the gastric wall in a short time. Argon laser irradiation was thus demonstrated not to be always safe.
3) All ulcers produced after Nd-YAG laser irradiation were almost healed within 3 weeks, and after 6 weeks all ulcers were re-epithelized completely.
4) Complete hemostasis for the bleedig from gastric ulcers was achieved more rapidly by Nd-YAG laser than by argon laser and monopolar electrocoagulation.
To control the bleeding from gastrointestinal tract, the irradiation of high power Nd-YAG laser is most effective and safe.

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